Researchers in the undersea laboratory Aquatica have genetically altered the brains of captive sharks to develop a potential cure for Alzheimer's disease. There is one unexpected side effect: the sharks are getting smarter. Which could mean trouble for the researchers. And lunch for the sharks.

You can swim but you can't hide when a tropical storm floods Aquatica, plunging Samuel L. Jackson, Saffron Burrows, Thomas Jane, L.L. Cool J, and the rest of the crew into a harrowing battle of wits against sleek killing-and thinking!-machines.

Renny Harlin (Cliffhanger, Die Hard 2) directs, squeezing nerve-jangling suspense and thrills from a film that's a monster movie, a chase movie, a movie that snaps hold and won't let go. Dive in., Researchers in the undersea laboratory Aquatica have genetically altered the brains of captive sharks to develop a potential cure for Alzheimer's disease. There is one unexpected side effect: the sharks are getting smarter. Which could mean trouble for the researchers. And lunch for the sharks.

You can swim but you can't hide when a tropical storm floods Aquatica, plunging Samuel L. Jackson, Saffron Burrows, Thomas Jane, L.L. Cool J, and the rest of the crew into a harrowing battle of wits against sleek killing-and thinking!-machines.

Renny Harlin (Cliffhanger, Die Hard 2) directs, squeezing nerve-jangling suspense and thrills from a film that's a monster movie, a chase movie, a movie that snaps hold and won't let go. Dive in.

Special Features:

• Documentaries. Star/Director Commentaries. Deleted Scenes. Stills Gallery. Inter